#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/byteorder/generic.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>
#define RTQ9124_REG_SDI_SEL 0x00
#define RTQ9124_REG_SDO_SEL 0x01
#define RTQ9124_REG_I2S_OPT 0x02
#define RTQ9124_REG_AMP_OPT 0x03
#define RTQ9124_REG_STATE_CTRL 0x04
#define RTQ9124_REG_PWM_PHASE 0x05
#define RTQ9124_REG_SIL_CTRL 0x06
#define RTQ9124_REG_PWM_SS_OPT 0x07
#define RTQ9124_REG_ERR_INT_0 0x10
#define RTQ9124_REG_ERR_MASK6 0x26
#define RTQ9124_REG_TDM_TX_CH0 0x32
#define RTQ9124_REG_TDM_RX_CH0 0x34
#define RTQ9124_REG_VOL_OPT 0x38
#define RTQ9124_REG_DCR_TH 0x4B
#define RTQ9124_REG_ERR_TH 0x4C
#define RTQ9124_REG_PROT_EN 0x5B
#define RTQ9124_REG_PRJ_CODE 0xF9
#define RTQ9124_MASK_CS_DATA_INV BIT(9)
#define RTQ9124_MASK_VDDIO_SDO_SEL BIT(8)
#define RTQ9124_MASK_AUD_BITS GENMASK(5, 4)
#define RTQ9124_MASK_AUD_FMT GENMASK(3, 0)
#define RTQ9124_MASK_CH_STATE GENMASK(1, 0)
#define RTQ9124_MASK_SF_RESET BIT(15)
#define RTQ9124_FIXED_VENID 0x9124
struct rtq9124_priv {
struct gpio_desc *enable;
unsigned int dai_fmt;
int tdm_slots;
int tdm_slot_width;
};
static int rtq9124_enable_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol,
int event)
{
struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
unsigned int i, chan_state;
switch (event) {
case SND_SOC_DAPM_POST_PMU:
chan_state = 0;
break;
case SND_SOC_DAPM_POST_PMD:
chan_state = 1;
break;
default:
return -EINVAL;
}
for (i = 0; !chan_state && i < 8; i++)
snd_soc_component_write(comp, RTQ9124_REG_ERR_INT_0 + i, 0xffff);
snd_soc_component_write_field(comp, RTQ9124_REG_STATE_CTRL, RTQ9124_MASK_CH_STATE,
chan_state);
return 0;
}
static const struct snd_soc_dapm_widget rtq9124_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("SPK"),
SND_SOC_DAPM_OUT_DRV_E("Amp Drv", SND_SOC_NOPM, 0, 0, NULL, 0, rtq9124_enable_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
};
static const struct snd_soc_dapm_route rtq9124_dapm_routes[] = {
{ "Amp Drv", NULL, "HiFi Playback" },
{ "SPK", NULL, "Amp Drv" },
};
static const DECLARE_TLV_DB_SCALE(dig_tlv, -10375, 25, 0);
static const DECLARE_TLV_DB_RANGE(ana_tlv,
0, 3, TLV_DB_SCALE_ITEM(-600, 600, 0),
4, 6, TLV_DB_SCALE_ITEM(1400, 200, 0));
static const char * const i2sch_text[] = { "(L+R)/2", "LCH", "RCH", "(L+R)/2" };
static const struct soc_enum rtq9124_i2sch_select_enum =
SOC_ENUM_SINGLE(RTQ9124_REG_SDI_SEL, 0, ARRAY_SIZE(i2sch_text), i2sch_text);
static const char * const sdo_vsel_text[] = { "1.8V", "3.3V" };
static const struct soc_enum rtq9124_sdo_vselect_enum =
SOC_ENUM_SINGLE(RTQ9124_REG_SDO_SEL, 8, ARRAY_SIZE(sdo_vsel_text), sdo_vsel_text);
static const char * const pwmfreq_text[] = { "8*fs", "10*fs", "40*fs", "44*fs", "48*fs" };
static const struct soc_enum rtq9124_pwm_freq_enum =
SOC_ENUM_SINGLE(RTQ9124_REG_AMP_OPT, 4, ARRAY_SIZE(pwmfreq_text), pwmfreq_text);
static const char * const out_angle_text[] = { "0", "45", "90", "135", "180", "225", "270", "315" };
static const struct soc_enum rtq9124_out_angle_enum =
SOC_ENUM_SINGLE(RTQ9124_REG_PWM_PHASE, 0, ARRAY_SIZE(out_angle_text), out_angle_text);
static const char * const sdo_select_text[] = {
"None", "I2S DataI", "Interface", "DSP", "DF", "ISense", "ACLoad Cos", "ACLoad Sin",
"DCR",
};
static const struct soc_enum rtq9124_sdo_select_enum =
SOC_ENUM_DOUBLE(RTQ9124_REG_SDO_SEL, 4, 0, ARRAY_SIZE(sdo_select_text), sdo_select_text);
static const char * const ulqm_dcvt_text[] = { "Disable", "DC", "VT", "DC+VT" };
static const struct soc_enum rtq9124_ulqm_dcvt_select_enum =
SOC_ENUM_SINGLE(RTQ9124_REG_STATE_CTRL, 10, ARRAY_SIZE(ulqm_dcvt_text), ulqm_dcvt_text);
static const struct snd_kcontrol_new rtq9124_controls[] = {
SOC_SINGLE_TLV("Master Volume", RTQ9124_REG_VOL_OPT, 2, 511, 1, dig_tlv),
SOC_SINGLE_TLV("Speaker Volume", RTQ9124_REG_AMP_OPT, 0, 6, 0, ana_tlv),
SOC_ENUM("I2S CH Select", rtq9124_i2sch_select_enum),
SOC_ENUM("SDO VDDIO Select", rtq9124_sdo_vselect_enum),
SOC_ENUM("PWM Frequency Select", rtq9124_pwm_freq_enum),
SOC_ENUM("PWM Output Phase Select", rtq9124_out_angle_enum),
SOC_ENUM("SDO Select", rtq9124_sdo_select_enum),
SOC_ENUM("ULQM DCVT Select", rtq9124_ulqm_dcvt_select_enum),
SOC_SINGLE("Silence Detect Enable Switch", RTQ9124_REG_SIL_CTRL, 7, 1, 0),
SOC_SINGLE("Spread Spectrum Enable Switch", RTQ9124_REG_PWM_SS_OPT, 7, 1, 0),
};
static int rtq9124_comp_probe(struct snd_soc_component *comp)
{
snd_soc_component_write_field(comp, RTQ9124_REG_SDO_SEL, RTQ9124_MASK_CS_DATA_INV, 1);
snd_soc_component_write(comp, RTQ9124_REG_DCR_TH, 0x5e30);
snd_soc_component_write(comp, RTQ9124_REG_ERR_TH, 0x3ff);
snd_soc_component_write(comp, RTQ9124_REG_PROT_EN, 0x3fc);
snd_soc_component_write(comp, RTQ9124_REG_ERR_MASK6, 0);
return 0;
}
static const struct snd_soc_component_driver rtq9124_comp_driver = {
.probe = rtq9124_comp_probe,
.controls = rtq9124_controls,
.num_controls = ARRAY_SIZE(rtq9124_controls),
.dapm_widgets = rtq9124_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(rtq9124_dapm_widgets),
.dapm_routes = rtq9124_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(rtq9124_dapm_routes),
.use_pmdown_time = 1,
.endianness = 1,
};
static int rtq9124_dai_set_format(struct snd_soc_dai *dai, unsigned int fmt)
{
struct rtq9124_priv *rtq9124 = snd_soc_dai_get_drvdata(dai);
rtq9124->dai_fmt = fmt;
return 0;
}
static int rtq9124_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
unsigned int rx_mask, int slots, int slot_width)
{
struct rtq9124_priv *rtq9124 = snd_soc_dai_get_drvdata(dai);
struct snd_soc_component *comp = dai->component;
struct device *dev = dai->dev;
unsigned int byte_loc, i;
dev_dbg(dev, "(slots, slot_width) = (%d, %d), (txmask, rxmask) = 0x%x, 0x%x\n", slots,
slot_width, tx_mask, rx_mask);
if (slots <= 0 || slots > 16 || slot_width <= 0 || slots % 2 || slot_width % 8) {
dev_err(dev, "Invalid slot parameter (%d, %d)\n", slots, slot_width);
return -EINVAL;
}
if (tx_mask && (hweight_long(tx_mask) > 2 || fls(tx_mask) > slots)) {
dev_err(dev, "Invalid tx_mask 0x%08x, slots = %d\n", tx_mask, slots);
return -EINVAL;
}
if (!rx_mask || hweight_long(rx_mask) > 1 || fls(rx_mask) > slots) {
dev_err(dev, "Invalid rx_mask 0x%08x, slots = %d\n", rx_mask, slots);
return -EINVAL;
}
for (i = 0; tx_mask; i++, tx_mask ^= BIT(ffs(tx_mask) - 1)) {
byte_loc = (ffs(tx_mask) - 1) * slot_width / 8;
snd_soc_component_write(comp, RTQ9124_REG_TDM_TX_CH0 + i, byte_loc);
}
byte_loc = (ffs(rx_mask) - 1) * slot_width / 8;
snd_soc_component_write(comp, RTQ9124_REG_TDM_RX_CH0, byte_loc);
rtq9124->tdm_slots = slots;
rtq9124->tdm_slot_width = slot_width;
return 0;
}
static int rtq9124_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *param, struct snd_soc_dai *dai)
{
struct rtq9124_priv *rtq9124 = snd_soc_dai_get_drvdata(dai);
struct snd_soc_component *comp = dai->component;
unsigned int fmtval, width, slot_width, bitrate;
struct device *dev = dai->dev;
unsigned int audfmt, audbit;
fmtval = FIELD_GET(SND_SOC_DAIFMT_FORMAT_MASK, rtq9124->dai_fmt);
if (rtq9124->tdm_slots && fmtval != SND_SOC_DAIFMT_DSP_A &&
fmtval != SND_SOC_DAIFMT_DSP_B) {
dev_err(dev, "TDM only can support DSP_A or DSP_B format\n");
return -EINVAL;
}
switch (fmtval) {
case SND_SOC_DAIFMT_I2S:
audfmt = 0;
break;
case SND_SOC_DAIFMT_LEFT_J:
audfmt = 1;
break;
case SND_SOC_DAIFMT_RIGHT_J:
audfmt = 2;
break;
case SND_SOC_DAIFMT_DSP_B:
audfmt = rtq9124->tdm_slots ? 7 : 3;
break;
case SND_SOC_DAIFMT_DSP_A:
audfmt = rtq9124->tdm_slots ? 15 : 11;
break;
default:
dev_err(dev, "Unsupported format %d\n", fmtval);
return -EINVAL;
}
switch (width = params_width(param)) {
case 16:
audbit = 0;
break;
case 20:
audbit = 1;
break;
case 24:
case 32:
audbit = 3;
break;
default:
dev_err(dev, "Unsupported width %d\n", width);
return -EINVAL;
}
if (rtq9124->tdm_slots) {
slot_width = params_physical_width(param);
if (slot_width > rtq9124->tdm_slot_width) {
dev_err(dev, "Slot width is larger than TDM slot width\n");
return -EINVAL;
}
bitrate = rtq9124->tdm_slots * rtq9124->tdm_slot_width * params_rate(param);
if (bitrate > 24576000) {
dev_err(dev, "Bitrate exceed the internal PLL 24.576MHz (%d)\n", bitrate);
return -EINVAL;
}
}
snd_soc_component_write_field(comp, RTQ9124_REG_I2S_OPT, RTQ9124_MASK_AUD_FMT, audfmt);
snd_soc_component_write_field(comp, RTQ9124_REG_I2S_OPT, RTQ9124_MASK_AUD_BITS, audbit);
return 0;
}
static const struct snd_soc_dai_ops rtq9124_dai_ops = {
.set_fmt = rtq9124_dai_set_format,
.set_tdm_slot = rtq9124_dai_set_tdm_slot,
.hw_params = rtq9124_dai_hw_params,
};
static struct snd_soc_dai_driver rtq9124_dai_driver = {
.name = "HiFi",
.playback = {
.stream_name = "HiFi Playback",
.formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 |
SNDRV_PCM_FMTBIT_S32,
.rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_24000 |
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
SNDRV_PCM_RATE_192000,
.rate_min = 8000,
.rate_max = 192000,
.channels_min = 1,
.channels_max = 2,
},
.ops = &rtq9124_dai_ops,
.symmetric_rate = 1,
.symmetric_sample_bits = 1,
};
static bool rtq9124_readable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0x00 ... 0x17:
case 0x20 ... 0x27:
case 0x30 ... 0x3D:
case 0x40 ... 0x68:
case 0x80 ... 0xBC:
case 0xC0 ... 0xDE:
case 0xE0 ... 0xE7:
case 0xF0 ... 0xFD:
return true;
default:
return false;
}
}
static bool rtq9124_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0x00 ... 0x09:
case 0x0C ... 0x0E:
case 0x10 ... 0x17:
case 0x20 ... 0x27:
case 0x30:
case 0x32 ... 0x3D:
case 0x40 ... 0x4E:
case 0x50 ... 0x68:
case 0x80 ... 0xBC:
case 0xC0 ... 0xDE:
case 0xE0 ... 0xE7:
case 0xF0 ... 0xFD:
return true;
default:
return false;
}
}
static bool rtq9124_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0x0A ... 0x0B:
case 0x0F ... 0x17:
case 0x31:
case 0x4F:
case 0x51:
case 0x53 ... 0x57:
case 0x80 ... 0xBC:
case 0xC0 ... 0xDE:
case 0xE0 ... 0xE7:
case 0xF0 ... 0xFD:
return true;
default:
return false;
}
}
static inline u8 rtq9124_get_reg_len(unsigned int reg)
{
return (reg >= 0x40 && reg <= 0x47) ? 4 : 2;
}
static int rtq9124_regmap_read(void *context, const void *reg_buf, size_t reg_size, void *val_buf,
size_t val_size)
{
struct i2c_client *i2c = context;
u8 reg = *(u8 *)reg_buf;
u8 size = rtq9124_get_reg_len(reg);
u32 *val = val_buf;
int ret;
ret = i2c_smbus_read_i2c_block_data(i2c, reg, size, val_buf);
if (ret < 0)
return ret;
else if (ret != size)
return -EIO;
*val = size == 4 ? be32_to_cpup(val_buf) : be16_to_cpup(val_buf);
return 0;
}
static int rtq9124_regmap_write(void *context, const void *data, size_t count)
{
struct i2c_client *i2c = context;
u8 reg = *(u8 *)data, *vbuf;
u8 size = rtq9124_get_reg_len(reg);
__be16 val16 = cpu_to_be16p(data + 1);
__be32 val32 = cpu_to_be32p(data + 1);
vbuf = size == 4 ? (u8 *)&val32 : (u8 *)&val16;
return i2c_smbus_write_i2c_block_data(i2c, reg, size, vbuf);
}
static const struct regmap_config rtq9124_regmap_config = {
.name = "rtq9124",
.reg_bits = 8,
.val_bits = 32,
.read = rtq9124_regmap_read,
.write = rtq9124_regmap_write,
.readable_reg = rtq9124_readable_reg,
.writeable_reg = rtq9124_writeable_reg,
.volatile_reg = rtq9124_volatile_reg,
.cache_type = REGCACHE_MAPLE,
.num_reg_defaults_raw = 0xFD + 1,
.use_single_read = 1,
.use_single_write = 1,
};
static const struct reg_sequence rtq9124_init_regs[] = {
{ 0xfb, 0x0065 },
{ 0x93, 0x2000 },
{ 0xfb, 0x0000 },
};
static int rtq9124_probe(struct i2c_client *i2c)
{
struct device *dev = &i2c->dev;
struct rtq9124_priv *rtq9124;
struct regmap *regmap;
int ret;
rtq9124 = devm_kzalloc(dev, sizeof(*rtq9124), GFP_KERNEL);
if (!rtq9124)
return -ENOMEM;
rtq9124->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);
if (IS_ERR(rtq9124->enable))
return PTR_ERR(rtq9124->enable);
else if (rtq9124->enable)
usleep_range(6000, 7000);
else
dev_dbg(dev, "No 'enable' GPIO specified, treat it as default on\n");
ret = i2c_smbus_read_word_swapped(i2c, RTQ9124_REG_PRJ_CODE);
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to read project code\n");
else if (ret != RTQ9124_FIXED_VENID)
return dev_err_probe(dev, -ENODEV, "Incorrect project-code 0x%04x\n", ret);
ret = i2c_smbus_write_word_swapped(i2c, RTQ9124_REG_STATE_CTRL, RTQ9124_MASK_SF_RESET);
if (ret)
return dev_err_probe(dev, ret, "Failed to trigger RG reset\n");
usleep_range(10000, 11000);
regmap = devm_regmap_init(dev, NULL, i2c, &rtq9124_regmap_config);
if (IS_ERR(regmap))
return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
ret = regmap_register_patch(regmap, rtq9124_init_regs, ARRAY_SIZE(rtq9124_init_regs));
if (ret)
return dev_err_probe(dev, ret, "Failed to register regmap patch\n");
i2c_set_clientdata(i2c, rtq9124);
pm_runtime_set_autosuspend_delay(dev, 1000);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_active(dev);
ret = devm_pm_runtime_enable(dev);
if (ret)
return dev_err_probe(dev, ret, "Failed to enable pm runtime\n");
return devm_snd_soc_register_component(dev, &rtq9124_comp_driver, &rtq9124_dai_driver, 1);
}
#ifdef CONFIG_PM
static int rtq9124_runtime_suspend(struct device *dev)
{
struct rtq9124_priv *rtq9124 = dev_get_drvdata(dev);
struct regmap *regmap = dev_get_regmap(dev, NULL);
if (rtq9124->enable) {
regcache_cache_only(regmap, true);
regcache_mark_dirty(regmap);
gpiod_set_value(rtq9124->enable, 0);
}
return 0;
}
static int rtq9124_runtime_resume(struct device *dev)
{
struct rtq9124_priv *rtq9124 = dev_get_drvdata(dev);
struct regmap *regmap = dev_get_regmap(dev, NULL);
int ret;
if (rtq9124->enable) {
gpiod_set_value(rtq9124->enable, 1);
usleep_range(6000, 7000);
regcache_cache_only(regmap, false);
ret = regcache_sync(regmap);
if (ret)
return ret;
}
return 0;
}
#endif
static const struct dev_pm_ops rtq9124_dev_pm_ops = {
SET_RUNTIME_PM_OPS(rtq9124_runtime_suspend, rtq9124_runtime_resume, NULL)
};
#ifdef CONFIG_OF
static const struct of_device_id rtq9124_device_id[] = {
{ .compatible = "richtek,rtq9124" },
{}
};
MODULE_DEVICE_TABLE(of, rtq9124_device_id);
#endif
static struct i2c_driver rtq9124_driver = {
.driver = {
.name = "rtq9124",
.of_match_table = of_match_ptr(rtq9124_device_id),
.pm = pm_ptr(&rtq9124_dev_pm_ops),
},
.probe = rtq9124_probe,
};
module_i2c_driver(rtq9124_driver);
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
MODULE_DESCRIPTION("ASoC RTQ9124 Driver");
MODULE_LICENSE("GPL");
